* c-parse.in (language_string): Constify.

	* dwarf2out.c (language_string): Remove declaration.

	* dwarfout.c (language_string): Likewise.

	* toplev.c (language_string, init_parse, finish_parse): Likewise.

	* tree.h (language_string, init_parse, finish_parse): Declare.

	* i386/sun386.h (language_string): Remove declaration.

	* mips.h (language_string): Likewise.

	* nextstep.h (language_string): Likewise.

	* nextstep21.h (language_string): Likewise.

	* rs6000.c (language_string): Likewise.

In ch:
	* parse.c (language_string): Constify.
In cp:
	* parse.y (language_string): Constify.
In f:
	* com.c (language_string): Constify.
In java:
	* lang.c (language_string): Constify.

From-SVN: r29000